define(function(require, exports, module) {

  // var Backbone = require('backbone');
  var $ = require('jquery');
  var _ = require('underscore');
  // var jsonview = require('jsonview');
  var tmpl = require('text!../tmpl.html');
  var d3 = require('d3v3')
  var json = require('json!hy5b/auto/ci.json')

  function main() {
    var $app = $('<div id="app">');
    $('#main').html($app);

    $app.append(tmpl);

    var m = [20, 120, 20, 120],
      w = 1280 - m[1] - m[3],
      h = 800 - m[0] - m[2],
      i = 0,
      root;

    var tree = d3.layout.tree()
      .size([h, w]);

    var diagonal = d3.svg.diagonal()
      .projection(function(d) {
        return [d.y, d.x];
      });

    var vis = d3.select("#chart").append("svg:svg")
      .attr("width", w + m[1] + m[3])
      .attr("height", h + m[0] + m[2])
      .append("svg:g")
      .attr("transform", "translate(" + m[3] + "," + m[0] + ")");

    root = json;
    root.x0 = h / 2;
    root.y0 = 0;

    function toggleAll(d) {
      if (d.children) {
        d.children.forEach(toggleAll);
        toggle(d);
      }
    }

    // Initialize the display to show a few nodes.
    root.children.forEach(toggleAll);
    toggle(root.children[1]);
    toggle(root.children[1].children[2]);

    update(root);

    function update(source) {
      var duration = d3.event && d3.event.altKey ? 5000 : 500;

      // Compute the new tree layout.
      var nodes = tree.nodes(root).reverse();

      // Normalize for fixed-depth.
      nodes.forEach(function(d) { d.y = d.depth * 180; });

      // Update the nodes…
      var node = vis.selectAll("g.node")
        .data(nodes, function(d) {
          return d.id || (d.id = ++i);
        });

      // Enter any new nodes at the parent's previous position.
      var nodeEnter = node.enter().append("svg:g")
        .attr("class", "node")
        .attr("transform", function(d) {
          return "translate(" + source.y0 + "," + source.x0 + ")";
        })
        .on("click", function(d) {
          toggle(d);
          update(d);
        });

      nodeEnter.append("svg:circle")
        .attr("r", 1e-6)
        .style("fill", function(d) {
          return d._children ? "lightsteelblue" : "#fff";
        });

      nodeEnter.append("svg:text")
        .attr("x", function(d) {
          return d.children || d._children ? -10 : 10;
        })
        .attr("dy", ".35em")
        .attr("text-anchor", function(d) {
          return d.children || d._children ? "end" : "start";
        })
        .text(function(d) {
          return d.name;
        })
        .style("fill-opacity", 1e-6);

      // Transition nodes to their new position.
      var nodeUpdate = node.transition()
        .duration(duration)
        .attr("transform", function(d) {
          return "translate(" + d.y + "," + d.x + ")";
        });

      nodeUpdate.select("circle")
        .attr("r", 4.5)
        .style("fill", function(d) {
          return d._children ? "lightsteelblue" : "#fff";
        });

      nodeUpdate.select("text")
        .style("fill-opacity", 1);

      // Transition exiting nodes to the parent's new position.
      var nodeExit = node.exit().transition()
        .duration(duration)
        .attr("transform", function(d) {
          return "translate(" + source.y + "," + source.x + ")";
        })
        .remove();

      nodeExit.select("circle")
        .attr("r", 1e-6);

      nodeExit.select("text")
        .style("fill-opacity", 1e-6);

      // Update the links…
      var link = vis.selectAll("path.link")
        .data(tree.links(nodes), function(d) {
          return d.target.id;
        });

      // Enter any new links at the parent's previous position.
      link.enter().insert("svg:path", "g")
        .attr("class", "link")
        .attr("d", function(d) {
          var o = { x: source.x0, y: source.y0 };
          return diagonal({ source: o, target: o });
        })
        .transition()
        .duration(duration)
        .attr("d", diagonal);

      // Transition links to their new position.
      link.transition()
        .duration(duration)
        .attr("d", diagonal);

      // Transition exiting nodes to the parent's new position.
      link.exit().transition()
        .duration(duration)
        .attr("d", function(d) {
          var o = { x: source.x, y: source.y };
          return diagonal({ source: o, target: o });
        })
        .remove();

      // Stash the old positions for transition.
      nodes.forEach(function(d) {
        d.x0 = d.x;
        d.y0 = d.y;
      });
    }

    // Toggle children.
    function toggle(d) {
      if (d.children) {
        d._children = d.children;
        d.children = null;
      } else {
        d.children = d._children;
        d._children = null;
      }
    }
  }

  return main;
})
